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| /* SPDX-License-Identifier: GPL-2.0+ */
| /*
| * ChaCha 256-bit cipher algorithm, x64 AVX-512VL functions
| *
| * Copyright (C) 2018 Martin Willi
| */
|
| #include <linux/linkage.h>
|
| .section .rodata.cst32.CTR2BL, "aM", @progbits, 32
| .align 32
| CTR2BL: .octa 0x00000000000000000000000000000000
| .octa 0x00000000000000000000000000000001
|
| .section .rodata.cst32.CTR4BL, "aM", @progbits, 32
| .align 32
| CTR4BL: .octa 0x00000000000000000000000000000002
| .octa 0x00000000000000000000000000000003
|
| .section .rodata.cst32.CTR8BL, "aM", @progbits, 32
| .align 32
| CTR8BL: .octa 0x00000003000000020000000100000000
| .octa 0x00000007000000060000000500000004
|
| .text
|
| ENTRY(chacha_2block_xor_avx512vl)
| # %rdi: Input state matrix, s
| # %rsi: up to 2 data blocks output, o
| # %rdx: up to 2 data blocks input, i
| # %rcx: input/output length in bytes
| # %r8d: nrounds
|
| # This function encrypts two ChaCha blocks by loading the state
| # matrix twice across four AVX registers. It performs matrix operations
| # on four words in each matrix in parallel, but requires shuffling to
| # rearrange the words after each round.
|
| vzeroupper
|
| # x0..3[0-2] = s0..3
| vbroadcasti128 0x00(%rdi),%ymm0
| vbroadcasti128 0x10(%rdi),%ymm1
| vbroadcasti128 0x20(%rdi),%ymm2
| vbroadcasti128 0x30(%rdi),%ymm3
|
| vpaddd CTR2BL(%rip),%ymm3,%ymm3
|
| vmovdqa %ymm0,%ymm8
| vmovdqa %ymm1,%ymm9
| vmovdqa %ymm2,%ymm10
| vmovdqa %ymm3,%ymm11
|
| .Ldoubleround:
|
| # x0 += x1, x3 = rotl32(x3 ^ x0, 16)
| vpaddd %ymm1,%ymm0,%ymm0
| vpxord %ymm0,%ymm3,%ymm3
| vprold $16,%ymm3,%ymm3
|
| # x2 += x3, x1 = rotl32(x1 ^ x2, 12)
| vpaddd %ymm3,%ymm2,%ymm2
| vpxord %ymm2,%ymm1,%ymm1
| vprold $12,%ymm1,%ymm1
|
| # x0 += x1, x3 = rotl32(x3 ^ x0, 8)
| vpaddd %ymm1,%ymm0,%ymm0
| vpxord %ymm0,%ymm3,%ymm3
| vprold $8,%ymm3,%ymm3
|
| # x2 += x3, x1 = rotl32(x1 ^ x2, 7)
| vpaddd %ymm3,%ymm2,%ymm2
| vpxord %ymm2,%ymm1,%ymm1
| vprold $7,%ymm1,%ymm1
|
| # x1 = shuffle32(x1, MASK(0, 3, 2, 1))
| vpshufd $0x39,%ymm1,%ymm1
| # x2 = shuffle32(x2, MASK(1, 0, 3, 2))
| vpshufd $0x4e,%ymm2,%ymm2
| # x3 = shuffle32(x3, MASK(2, 1, 0, 3))
| vpshufd $0x93,%ymm3,%ymm3
|
| # x0 += x1, x3 = rotl32(x3 ^ x0, 16)
| vpaddd %ymm1,%ymm0,%ymm0
| vpxord %ymm0,%ymm3,%ymm3
| vprold $16,%ymm3,%ymm3
|
| # x2 += x3, x1 = rotl32(x1 ^ x2, 12)
| vpaddd %ymm3,%ymm2,%ymm2
| vpxord %ymm2,%ymm1,%ymm1
| vprold $12,%ymm1,%ymm1
|
| # x0 += x1, x3 = rotl32(x3 ^ x0, 8)
| vpaddd %ymm1,%ymm0,%ymm0
| vpxord %ymm0,%ymm3,%ymm3
| vprold $8,%ymm3,%ymm3
|
| # x2 += x3, x1 = rotl32(x1 ^ x2, 7)
| vpaddd %ymm3,%ymm2,%ymm2
| vpxord %ymm2,%ymm1,%ymm1
| vprold $7,%ymm1,%ymm1
|
| # x1 = shuffle32(x1, MASK(2, 1, 0, 3))
| vpshufd $0x93,%ymm1,%ymm1
| # x2 = shuffle32(x2, MASK(1, 0, 3, 2))
| vpshufd $0x4e,%ymm2,%ymm2
| # x3 = shuffle32(x3, MASK(0, 3, 2, 1))
| vpshufd $0x39,%ymm3,%ymm3
|
| sub $2,%r8d
| jnz .Ldoubleround
|
| # o0 = i0 ^ (x0 + s0)
| vpaddd %ymm8,%ymm0,%ymm7
| cmp $0x10,%rcx
| jl .Lxorpart2
| vpxord 0x00(%rdx),%xmm7,%xmm6
| vmovdqu %xmm6,0x00(%rsi)
| vextracti128 $1,%ymm7,%xmm0
| # o1 = i1 ^ (x1 + s1)
| vpaddd %ymm9,%ymm1,%ymm7
| cmp $0x20,%rcx
| jl .Lxorpart2
| vpxord 0x10(%rdx),%xmm7,%xmm6
| vmovdqu %xmm6,0x10(%rsi)
| vextracti128 $1,%ymm7,%xmm1
| # o2 = i2 ^ (x2 + s2)
| vpaddd %ymm10,%ymm2,%ymm7
| cmp $0x30,%rcx
| jl .Lxorpart2
| vpxord 0x20(%rdx),%xmm7,%xmm6
| vmovdqu %xmm6,0x20(%rsi)
| vextracti128 $1,%ymm7,%xmm2
| # o3 = i3 ^ (x3 + s3)
| vpaddd %ymm11,%ymm3,%ymm7
| cmp $0x40,%rcx
| jl .Lxorpart2
| vpxord 0x30(%rdx),%xmm7,%xmm6
| vmovdqu %xmm6,0x30(%rsi)
| vextracti128 $1,%ymm7,%xmm3
|
| # xor and write second block
| vmovdqa %xmm0,%xmm7
| cmp $0x50,%rcx
| jl .Lxorpart2
| vpxord 0x40(%rdx),%xmm7,%xmm6
| vmovdqu %xmm6,0x40(%rsi)
|
| vmovdqa %xmm1,%xmm7
| cmp $0x60,%rcx
| jl .Lxorpart2
| vpxord 0x50(%rdx),%xmm7,%xmm6
| vmovdqu %xmm6,0x50(%rsi)
|
| vmovdqa %xmm2,%xmm7
| cmp $0x70,%rcx
| jl .Lxorpart2
| vpxord 0x60(%rdx),%xmm7,%xmm6
| vmovdqu %xmm6,0x60(%rsi)
|
| vmovdqa %xmm3,%xmm7
| cmp $0x80,%rcx
| jl .Lxorpart2
| vpxord 0x70(%rdx),%xmm7,%xmm6
| vmovdqu %xmm6,0x70(%rsi)
|
| .Ldone2:
| vzeroupper
| ret
|
| .Lxorpart2:
| # xor remaining bytes from partial register into output
| mov %rcx,%rax
| and $0xf,%rcx
| jz .Ldone8
| mov %rax,%r9
| and $~0xf,%r9
|
| mov $1,%rax
| shld %cl,%rax,%rax
| sub $1,%rax
| kmovq %rax,%k1
|
| vmovdqu8 (%rdx,%r9),%xmm1{%k1}{z}
| vpxord %xmm7,%xmm1,%xmm1
| vmovdqu8 %xmm1,(%rsi,%r9){%k1}
|
| jmp .Ldone2
|
| ENDPROC(chacha_2block_xor_avx512vl)
|
| ENTRY(chacha_4block_xor_avx512vl)
| # %rdi: Input state matrix, s
| # %rsi: up to 4 data blocks output, o
| # %rdx: up to 4 data blocks input, i
| # %rcx: input/output length in bytes
| # %r8d: nrounds
|
| # This function encrypts four ChaCha blocks by loading the state
| # matrix four times across eight AVX registers. It performs matrix
| # operations on four words in two matrices in parallel, sequentially
| # to the operations on the four words of the other two matrices. The
| # required word shuffling has a rather high latency, we can do the
| # arithmetic on two matrix-pairs without much slowdown.
|
| vzeroupper
|
| # x0..3[0-4] = s0..3
| vbroadcasti128 0x00(%rdi),%ymm0
| vbroadcasti128 0x10(%rdi),%ymm1
| vbroadcasti128 0x20(%rdi),%ymm2
| vbroadcasti128 0x30(%rdi),%ymm3
|
| vmovdqa %ymm0,%ymm4
| vmovdqa %ymm1,%ymm5
| vmovdqa %ymm2,%ymm6
| vmovdqa %ymm3,%ymm7
|
| vpaddd CTR2BL(%rip),%ymm3,%ymm3
| vpaddd CTR4BL(%rip),%ymm7,%ymm7
|
| vmovdqa %ymm0,%ymm11
| vmovdqa %ymm1,%ymm12
| vmovdqa %ymm2,%ymm13
| vmovdqa %ymm3,%ymm14
| vmovdqa %ymm7,%ymm15
|
| .Ldoubleround4:
|
| # x0 += x1, x3 = rotl32(x3 ^ x0, 16)
| vpaddd %ymm1,%ymm0,%ymm0
| vpxord %ymm0,%ymm3,%ymm3
| vprold $16,%ymm3,%ymm3
|
| vpaddd %ymm5,%ymm4,%ymm4
| vpxord %ymm4,%ymm7,%ymm7
| vprold $16,%ymm7,%ymm7
|
| # x2 += x3, x1 = rotl32(x1 ^ x2, 12)
| vpaddd %ymm3,%ymm2,%ymm2
| vpxord %ymm2,%ymm1,%ymm1
| vprold $12,%ymm1,%ymm1
|
| vpaddd %ymm7,%ymm6,%ymm6
| vpxord %ymm6,%ymm5,%ymm5
| vprold $12,%ymm5,%ymm5
|
| # x0 += x1, x3 = rotl32(x3 ^ x0, 8)
| vpaddd %ymm1,%ymm0,%ymm0
| vpxord %ymm0,%ymm3,%ymm3
| vprold $8,%ymm3,%ymm3
|
| vpaddd %ymm5,%ymm4,%ymm4
| vpxord %ymm4,%ymm7,%ymm7
| vprold $8,%ymm7,%ymm7
|
| # x2 += x3, x1 = rotl32(x1 ^ x2, 7)
| vpaddd %ymm3,%ymm2,%ymm2
| vpxord %ymm2,%ymm1,%ymm1
| vprold $7,%ymm1,%ymm1
|
| vpaddd %ymm7,%ymm6,%ymm6
| vpxord %ymm6,%ymm5,%ymm5
| vprold $7,%ymm5,%ymm5
|
| # x1 = shuffle32(x1, MASK(0, 3, 2, 1))
| vpshufd $0x39,%ymm1,%ymm1
| vpshufd $0x39,%ymm5,%ymm5
| # x2 = shuffle32(x2, MASK(1, 0, 3, 2))
| vpshufd $0x4e,%ymm2,%ymm2
| vpshufd $0x4e,%ymm6,%ymm6
| # x3 = shuffle32(x3, MASK(2, 1, 0, 3))
| vpshufd $0x93,%ymm3,%ymm3
| vpshufd $0x93,%ymm7,%ymm7
|
| # x0 += x1, x3 = rotl32(x3 ^ x0, 16)
| vpaddd %ymm1,%ymm0,%ymm0
| vpxord %ymm0,%ymm3,%ymm3
| vprold $16,%ymm3,%ymm3
|
| vpaddd %ymm5,%ymm4,%ymm4
| vpxord %ymm4,%ymm7,%ymm7
| vprold $16,%ymm7,%ymm7
|
| # x2 += x3, x1 = rotl32(x1 ^ x2, 12)
| vpaddd %ymm3,%ymm2,%ymm2
| vpxord %ymm2,%ymm1,%ymm1
| vprold $12,%ymm1,%ymm1
|
| vpaddd %ymm7,%ymm6,%ymm6
| vpxord %ymm6,%ymm5,%ymm5
| vprold $12,%ymm5,%ymm5
|
| # x0 += x1, x3 = rotl32(x3 ^ x0, 8)
| vpaddd %ymm1,%ymm0,%ymm0
| vpxord %ymm0,%ymm3,%ymm3
| vprold $8,%ymm3,%ymm3
|
| vpaddd %ymm5,%ymm4,%ymm4
| vpxord %ymm4,%ymm7,%ymm7
| vprold $8,%ymm7,%ymm7
|
| # x2 += x3, x1 = rotl32(x1 ^ x2, 7)
| vpaddd %ymm3,%ymm2,%ymm2
| vpxord %ymm2,%ymm1,%ymm1
| vprold $7,%ymm1,%ymm1
|
| vpaddd %ymm7,%ymm6,%ymm6
| vpxord %ymm6,%ymm5,%ymm5
| vprold $7,%ymm5,%ymm5
|
| # x1 = shuffle32(x1, MASK(2, 1, 0, 3))
| vpshufd $0x93,%ymm1,%ymm1
| vpshufd $0x93,%ymm5,%ymm5
| # x2 = shuffle32(x2, MASK(1, 0, 3, 2))
| vpshufd $0x4e,%ymm2,%ymm2
| vpshufd $0x4e,%ymm6,%ymm6
| # x3 = shuffle32(x3, MASK(0, 3, 2, 1))
| vpshufd $0x39,%ymm3,%ymm3
| vpshufd $0x39,%ymm7,%ymm7
|
| sub $2,%r8d
| jnz .Ldoubleround4
|
| # o0 = i0 ^ (x0 + s0), first block
| vpaddd %ymm11,%ymm0,%ymm10
| cmp $0x10,%rcx
| jl .Lxorpart4
| vpxord 0x00(%rdx),%xmm10,%xmm9
| vmovdqu %xmm9,0x00(%rsi)
| vextracti128 $1,%ymm10,%xmm0
| # o1 = i1 ^ (x1 + s1), first block
| vpaddd %ymm12,%ymm1,%ymm10
| cmp $0x20,%rcx
| jl .Lxorpart4
| vpxord 0x10(%rdx),%xmm10,%xmm9
| vmovdqu %xmm9,0x10(%rsi)
| vextracti128 $1,%ymm10,%xmm1
| # o2 = i2 ^ (x2 + s2), first block
| vpaddd %ymm13,%ymm2,%ymm10
| cmp $0x30,%rcx
| jl .Lxorpart4
| vpxord 0x20(%rdx),%xmm10,%xmm9
| vmovdqu %xmm9,0x20(%rsi)
| vextracti128 $1,%ymm10,%xmm2
| # o3 = i3 ^ (x3 + s3), first block
| vpaddd %ymm14,%ymm3,%ymm10
| cmp $0x40,%rcx
| jl .Lxorpart4
| vpxord 0x30(%rdx),%xmm10,%xmm9
| vmovdqu %xmm9,0x30(%rsi)
| vextracti128 $1,%ymm10,%xmm3
|
| # xor and write second block
| vmovdqa %xmm0,%xmm10
| cmp $0x50,%rcx
| jl .Lxorpart4
| vpxord 0x40(%rdx),%xmm10,%xmm9
| vmovdqu %xmm9,0x40(%rsi)
|
| vmovdqa %xmm1,%xmm10
| cmp $0x60,%rcx
| jl .Lxorpart4
| vpxord 0x50(%rdx),%xmm10,%xmm9
| vmovdqu %xmm9,0x50(%rsi)
|
| vmovdqa %xmm2,%xmm10
| cmp $0x70,%rcx
| jl .Lxorpart4
| vpxord 0x60(%rdx),%xmm10,%xmm9
| vmovdqu %xmm9,0x60(%rsi)
|
| vmovdqa %xmm3,%xmm10
| cmp $0x80,%rcx
| jl .Lxorpart4
| vpxord 0x70(%rdx),%xmm10,%xmm9
| vmovdqu %xmm9,0x70(%rsi)
|
| # o0 = i0 ^ (x0 + s0), third block
| vpaddd %ymm11,%ymm4,%ymm10
| cmp $0x90,%rcx
| jl .Lxorpart4
| vpxord 0x80(%rdx),%xmm10,%xmm9
| vmovdqu %xmm9,0x80(%rsi)
| vextracti128 $1,%ymm10,%xmm4
| # o1 = i1 ^ (x1 + s1), third block
| vpaddd %ymm12,%ymm5,%ymm10
| cmp $0xa0,%rcx
| jl .Lxorpart4
| vpxord 0x90(%rdx),%xmm10,%xmm9
| vmovdqu %xmm9,0x90(%rsi)
| vextracti128 $1,%ymm10,%xmm5
| # o2 = i2 ^ (x2 + s2), third block
| vpaddd %ymm13,%ymm6,%ymm10
| cmp $0xb0,%rcx
| jl .Lxorpart4
| vpxord 0xa0(%rdx),%xmm10,%xmm9
| vmovdqu %xmm9,0xa0(%rsi)
| vextracti128 $1,%ymm10,%xmm6
| # o3 = i3 ^ (x3 + s3), third block
| vpaddd %ymm15,%ymm7,%ymm10
| cmp $0xc0,%rcx
| jl .Lxorpart4
| vpxord 0xb0(%rdx),%xmm10,%xmm9
| vmovdqu %xmm9,0xb0(%rsi)
| vextracti128 $1,%ymm10,%xmm7
|
| # xor and write fourth block
| vmovdqa %xmm4,%xmm10
| cmp $0xd0,%rcx
| jl .Lxorpart4
| vpxord 0xc0(%rdx),%xmm10,%xmm9
| vmovdqu %xmm9,0xc0(%rsi)
|
| vmovdqa %xmm5,%xmm10
| cmp $0xe0,%rcx
| jl .Lxorpart4
| vpxord 0xd0(%rdx),%xmm10,%xmm9
| vmovdqu %xmm9,0xd0(%rsi)
|
| vmovdqa %xmm6,%xmm10
| cmp $0xf0,%rcx
| jl .Lxorpart4
| vpxord 0xe0(%rdx),%xmm10,%xmm9
| vmovdqu %xmm9,0xe0(%rsi)
|
| vmovdqa %xmm7,%xmm10
| cmp $0x100,%rcx
| jl .Lxorpart4
| vpxord 0xf0(%rdx),%xmm10,%xmm9
| vmovdqu %xmm9,0xf0(%rsi)
|
| .Ldone4:
| vzeroupper
| ret
|
| .Lxorpart4:
| # xor remaining bytes from partial register into output
| mov %rcx,%rax
| and $0xf,%rcx
| jz .Ldone8
| mov %rax,%r9
| and $~0xf,%r9
|
| mov $1,%rax
| shld %cl,%rax,%rax
| sub $1,%rax
| kmovq %rax,%k1
|
| vmovdqu8 (%rdx,%r9),%xmm1{%k1}{z}
| vpxord %xmm10,%xmm1,%xmm1
| vmovdqu8 %xmm1,(%rsi,%r9){%k1}
|
| jmp .Ldone4
|
| ENDPROC(chacha_4block_xor_avx512vl)
|
| ENTRY(chacha_8block_xor_avx512vl)
| # %rdi: Input state matrix, s
| # %rsi: up to 8 data blocks output, o
| # %rdx: up to 8 data blocks input, i
| # %rcx: input/output length in bytes
| # %r8d: nrounds
|
| # This function encrypts eight consecutive ChaCha blocks by loading
| # the state matrix in AVX registers eight times. Compared to AVX2, this
| # mostly benefits from the new rotate instructions in VL and the
| # additional registers.
|
| vzeroupper
|
| # x0..15[0-7] = s[0..15]
| vpbroadcastd 0x00(%rdi),%ymm0
| vpbroadcastd 0x04(%rdi),%ymm1
| vpbroadcastd 0x08(%rdi),%ymm2
| vpbroadcastd 0x0c(%rdi),%ymm3
| vpbroadcastd 0x10(%rdi),%ymm4
| vpbroadcastd 0x14(%rdi),%ymm5
| vpbroadcastd 0x18(%rdi),%ymm6
| vpbroadcastd 0x1c(%rdi),%ymm7
| vpbroadcastd 0x20(%rdi),%ymm8
| vpbroadcastd 0x24(%rdi),%ymm9
| vpbroadcastd 0x28(%rdi),%ymm10
| vpbroadcastd 0x2c(%rdi),%ymm11
| vpbroadcastd 0x30(%rdi),%ymm12
| vpbroadcastd 0x34(%rdi),%ymm13
| vpbroadcastd 0x38(%rdi),%ymm14
| vpbroadcastd 0x3c(%rdi),%ymm15
|
| # x12 += counter values 0-3
| vpaddd CTR8BL(%rip),%ymm12,%ymm12
|
| vmovdqa64 %ymm0,%ymm16
| vmovdqa64 %ymm1,%ymm17
| vmovdqa64 %ymm2,%ymm18
| vmovdqa64 %ymm3,%ymm19
| vmovdqa64 %ymm4,%ymm20
| vmovdqa64 %ymm5,%ymm21
| vmovdqa64 %ymm6,%ymm22
| vmovdqa64 %ymm7,%ymm23
| vmovdqa64 %ymm8,%ymm24
| vmovdqa64 %ymm9,%ymm25
| vmovdqa64 %ymm10,%ymm26
| vmovdqa64 %ymm11,%ymm27
| vmovdqa64 %ymm12,%ymm28
| vmovdqa64 %ymm13,%ymm29
| vmovdqa64 %ymm14,%ymm30
| vmovdqa64 %ymm15,%ymm31
|
| .Ldoubleround8:
| # x0 += x4, x12 = rotl32(x12 ^ x0, 16)
| vpaddd %ymm0,%ymm4,%ymm0
| vpxord %ymm0,%ymm12,%ymm12
| vprold $16,%ymm12,%ymm12
| # x1 += x5, x13 = rotl32(x13 ^ x1, 16)
| vpaddd %ymm1,%ymm5,%ymm1
| vpxord %ymm1,%ymm13,%ymm13
| vprold $16,%ymm13,%ymm13
| # x2 += x6, x14 = rotl32(x14 ^ x2, 16)
| vpaddd %ymm2,%ymm6,%ymm2
| vpxord %ymm2,%ymm14,%ymm14
| vprold $16,%ymm14,%ymm14
| # x3 += x7, x15 = rotl32(x15 ^ x3, 16)
| vpaddd %ymm3,%ymm7,%ymm3
| vpxord %ymm3,%ymm15,%ymm15
| vprold $16,%ymm15,%ymm15
|
| # x8 += x12, x4 = rotl32(x4 ^ x8, 12)
| vpaddd %ymm12,%ymm8,%ymm8
| vpxord %ymm8,%ymm4,%ymm4
| vprold $12,%ymm4,%ymm4
| # x9 += x13, x5 = rotl32(x5 ^ x9, 12)
| vpaddd %ymm13,%ymm9,%ymm9
| vpxord %ymm9,%ymm5,%ymm5
| vprold $12,%ymm5,%ymm5
| # x10 += x14, x6 = rotl32(x6 ^ x10, 12)
| vpaddd %ymm14,%ymm10,%ymm10
| vpxord %ymm10,%ymm6,%ymm6
| vprold $12,%ymm6,%ymm6
| # x11 += x15, x7 = rotl32(x7 ^ x11, 12)
| vpaddd %ymm15,%ymm11,%ymm11
| vpxord %ymm11,%ymm7,%ymm7
| vprold $12,%ymm7,%ymm7
|
| # x0 += x4, x12 = rotl32(x12 ^ x0, 8)
| vpaddd %ymm0,%ymm4,%ymm0
| vpxord %ymm0,%ymm12,%ymm12
| vprold $8,%ymm12,%ymm12
| # x1 += x5, x13 = rotl32(x13 ^ x1, 8)
| vpaddd %ymm1,%ymm5,%ymm1
| vpxord %ymm1,%ymm13,%ymm13
| vprold $8,%ymm13,%ymm13
| # x2 += x6, x14 = rotl32(x14 ^ x2, 8)
| vpaddd %ymm2,%ymm6,%ymm2
| vpxord %ymm2,%ymm14,%ymm14
| vprold $8,%ymm14,%ymm14
| # x3 += x7, x15 = rotl32(x15 ^ x3, 8)
| vpaddd %ymm3,%ymm7,%ymm3
| vpxord %ymm3,%ymm15,%ymm15
| vprold $8,%ymm15,%ymm15
|
| # x8 += x12, x4 = rotl32(x4 ^ x8, 7)
| vpaddd %ymm12,%ymm8,%ymm8
| vpxord %ymm8,%ymm4,%ymm4
| vprold $7,%ymm4,%ymm4
| # x9 += x13, x5 = rotl32(x5 ^ x9, 7)
| vpaddd %ymm13,%ymm9,%ymm9
| vpxord %ymm9,%ymm5,%ymm5
| vprold $7,%ymm5,%ymm5
| # x10 += x14, x6 = rotl32(x6 ^ x10, 7)
| vpaddd %ymm14,%ymm10,%ymm10
| vpxord %ymm10,%ymm6,%ymm6
| vprold $7,%ymm6,%ymm6
| # x11 += x15, x7 = rotl32(x7 ^ x11, 7)
| vpaddd %ymm15,%ymm11,%ymm11
| vpxord %ymm11,%ymm7,%ymm7
| vprold $7,%ymm7,%ymm7
|
| # x0 += x5, x15 = rotl32(x15 ^ x0, 16)
| vpaddd %ymm0,%ymm5,%ymm0
| vpxord %ymm0,%ymm15,%ymm15
| vprold $16,%ymm15,%ymm15
| # x1 += x6, x12 = rotl32(x12 ^ x1, 16)
| vpaddd %ymm1,%ymm6,%ymm1
| vpxord %ymm1,%ymm12,%ymm12
| vprold $16,%ymm12,%ymm12
| # x2 += x7, x13 = rotl32(x13 ^ x2, 16)
| vpaddd %ymm2,%ymm7,%ymm2
| vpxord %ymm2,%ymm13,%ymm13
| vprold $16,%ymm13,%ymm13
| # x3 += x4, x14 = rotl32(x14 ^ x3, 16)
| vpaddd %ymm3,%ymm4,%ymm3
| vpxord %ymm3,%ymm14,%ymm14
| vprold $16,%ymm14,%ymm14
|
| # x10 += x15, x5 = rotl32(x5 ^ x10, 12)
| vpaddd %ymm15,%ymm10,%ymm10
| vpxord %ymm10,%ymm5,%ymm5
| vprold $12,%ymm5,%ymm5
| # x11 += x12, x6 = rotl32(x6 ^ x11, 12)
| vpaddd %ymm12,%ymm11,%ymm11
| vpxord %ymm11,%ymm6,%ymm6
| vprold $12,%ymm6,%ymm6
| # x8 += x13, x7 = rotl32(x7 ^ x8, 12)
| vpaddd %ymm13,%ymm8,%ymm8
| vpxord %ymm8,%ymm7,%ymm7
| vprold $12,%ymm7,%ymm7
| # x9 += x14, x4 = rotl32(x4 ^ x9, 12)
| vpaddd %ymm14,%ymm9,%ymm9
| vpxord %ymm9,%ymm4,%ymm4
| vprold $12,%ymm4,%ymm4
|
| # x0 += x5, x15 = rotl32(x15 ^ x0, 8)
| vpaddd %ymm0,%ymm5,%ymm0
| vpxord %ymm0,%ymm15,%ymm15
| vprold $8,%ymm15,%ymm15
| # x1 += x6, x12 = rotl32(x12 ^ x1, 8)
| vpaddd %ymm1,%ymm6,%ymm1
| vpxord %ymm1,%ymm12,%ymm12
| vprold $8,%ymm12,%ymm12
| # x2 += x7, x13 = rotl32(x13 ^ x2, 8)
| vpaddd %ymm2,%ymm7,%ymm2
| vpxord %ymm2,%ymm13,%ymm13
| vprold $8,%ymm13,%ymm13
| # x3 += x4, x14 = rotl32(x14 ^ x3, 8)
| vpaddd %ymm3,%ymm4,%ymm3
| vpxord %ymm3,%ymm14,%ymm14
| vprold $8,%ymm14,%ymm14
|
| # x10 += x15, x5 = rotl32(x5 ^ x10, 7)
| vpaddd %ymm15,%ymm10,%ymm10
| vpxord %ymm10,%ymm5,%ymm5
| vprold $7,%ymm5,%ymm5
| # x11 += x12, x6 = rotl32(x6 ^ x11, 7)
| vpaddd %ymm12,%ymm11,%ymm11
| vpxord %ymm11,%ymm6,%ymm6
| vprold $7,%ymm6,%ymm6
| # x8 += x13, x7 = rotl32(x7 ^ x8, 7)
| vpaddd %ymm13,%ymm8,%ymm8
| vpxord %ymm8,%ymm7,%ymm7
| vprold $7,%ymm7,%ymm7
| # x9 += x14, x4 = rotl32(x4 ^ x9, 7)
| vpaddd %ymm14,%ymm9,%ymm9
| vpxord %ymm9,%ymm4,%ymm4
| vprold $7,%ymm4,%ymm4
|
| sub $2,%r8d
| jnz .Ldoubleround8
|
| # x0..15[0-3] += s[0..15]
| vpaddd %ymm16,%ymm0,%ymm0
| vpaddd %ymm17,%ymm1,%ymm1
| vpaddd %ymm18,%ymm2,%ymm2
| vpaddd %ymm19,%ymm3,%ymm3
| vpaddd %ymm20,%ymm4,%ymm4
| vpaddd %ymm21,%ymm5,%ymm5
| vpaddd %ymm22,%ymm6,%ymm6
| vpaddd %ymm23,%ymm7,%ymm7
| vpaddd %ymm24,%ymm8,%ymm8
| vpaddd %ymm25,%ymm9,%ymm9
| vpaddd %ymm26,%ymm10,%ymm10
| vpaddd %ymm27,%ymm11,%ymm11
| vpaddd %ymm28,%ymm12,%ymm12
| vpaddd %ymm29,%ymm13,%ymm13
| vpaddd %ymm30,%ymm14,%ymm14
| vpaddd %ymm31,%ymm15,%ymm15
|
| # interleave 32-bit words in state n, n+1
| vpunpckldq %ymm1,%ymm0,%ymm16
| vpunpckhdq %ymm1,%ymm0,%ymm17
| vpunpckldq %ymm3,%ymm2,%ymm18
| vpunpckhdq %ymm3,%ymm2,%ymm19
| vpunpckldq %ymm5,%ymm4,%ymm20
| vpunpckhdq %ymm5,%ymm4,%ymm21
| vpunpckldq %ymm7,%ymm6,%ymm22
| vpunpckhdq %ymm7,%ymm6,%ymm23
| vpunpckldq %ymm9,%ymm8,%ymm24
| vpunpckhdq %ymm9,%ymm8,%ymm25
| vpunpckldq %ymm11,%ymm10,%ymm26
| vpunpckhdq %ymm11,%ymm10,%ymm27
| vpunpckldq %ymm13,%ymm12,%ymm28
| vpunpckhdq %ymm13,%ymm12,%ymm29
| vpunpckldq %ymm15,%ymm14,%ymm30
| vpunpckhdq %ymm15,%ymm14,%ymm31
|
| # interleave 64-bit words in state n, n+2
| vpunpcklqdq %ymm18,%ymm16,%ymm0
| vpunpcklqdq %ymm19,%ymm17,%ymm1
| vpunpckhqdq %ymm18,%ymm16,%ymm2
| vpunpckhqdq %ymm19,%ymm17,%ymm3
| vpunpcklqdq %ymm22,%ymm20,%ymm4
| vpunpcklqdq %ymm23,%ymm21,%ymm5
| vpunpckhqdq %ymm22,%ymm20,%ymm6
| vpunpckhqdq %ymm23,%ymm21,%ymm7
| vpunpcklqdq %ymm26,%ymm24,%ymm8
| vpunpcklqdq %ymm27,%ymm25,%ymm9
| vpunpckhqdq %ymm26,%ymm24,%ymm10
| vpunpckhqdq %ymm27,%ymm25,%ymm11
| vpunpcklqdq %ymm30,%ymm28,%ymm12
| vpunpcklqdq %ymm31,%ymm29,%ymm13
| vpunpckhqdq %ymm30,%ymm28,%ymm14
| vpunpckhqdq %ymm31,%ymm29,%ymm15
|
| # interleave 128-bit words in state n, n+4
| # xor/write first four blocks
| vmovdqa64 %ymm0,%ymm16
| vperm2i128 $0x20,%ymm4,%ymm0,%ymm0
| cmp $0x0020,%rcx
| jl .Lxorpart8
| vpxord 0x0000(%rdx),%ymm0,%ymm0
| vmovdqu64 %ymm0,0x0000(%rsi)
| vmovdqa64 %ymm16,%ymm0
| vperm2i128 $0x31,%ymm4,%ymm0,%ymm4
|
| vperm2i128 $0x20,%ymm12,%ymm8,%ymm0
| cmp $0x0040,%rcx
| jl .Lxorpart8
| vpxord 0x0020(%rdx),%ymm0,%ymm0
| vmovdqu64 %ymm0,0x0020(%rsi)
| vperm2i128 $0x31,%ymm12,%ymm8,%ymm12
|
| vperm2i128 $0x20,%ymm6,%ymm2,%ymm0
| cmp $0x0060,%rcx
| jl .Lxorpart8
| vpxord 0x0040(%rdx),%ymm0,%ymm0
| vmovdqu64 %ymm0,0x0040(%rsi)
| vperm2i128 $0x31,%ymm6,%ymm2,%ymm6
|
| vperm2i128 $0x20,%ymm14,%ymm10,%ymm0
| cmp $0x0080,%rcx
| jl .Lxorpart8
| vpxord 0x0060(%rdx),%ymm0,%ymm0
| vmovdqu64 %ymm0,0x0060(%rsi)
| vperm2i128 $0x31,%ymm14,%ymm10,%ymm14
|
| vperm2i128 $0x20,%ymm5,%ymm1,%ymm0
| cmp $0x00a0,%rcx
| jl .Lxorpart8
| vpxord 0x0080(%rdx),%ymm0,%ymm0
| vmovdqu64 %ymm0,0x0080(%rsi)
| vperm2i128 $0x31,%ymm5,%ymm1,%ymm5
|
| vperm2i128 $0x20,%ymm13,%ymm9,%ymm0
| cmp $0x00c0,%rcx
| jl .Lxorpart8
| vpxord 0x00a0(%rdx),%ymm0,%ymm0
| vmovdqu64 %ymm0,0x00a0(%rsi)
| vperm2i128 $0x31,%ymm13,%ymm9,%ymm13
|
| vperm2i128 $0x20,%ymm7,%ymm3,%ymm0
| cmp $0x00e0,%rcx
| jl .Lxorpart8
| vpxord 0x00c0(%rdx),%ymm0,%ymm0
| vmovdqu64 %ymm0,0x00c0(%rsi)
| vperm2i128 $0x31,%ymm7,%ymm3,%ymm7
|
| vperm2i128 $0x20,%ymm15,%ymm11,%ymm0
| cmp $0x0100,%rcx
| jl .Lxorpart8
| vpxord 0x00e0(%rdx),%ymm0,%ymm0
| vmovdqu64 %ymm0,0x00e0(%rsi)
| vperm2i128 $0x31,%ymm15,%ymm11,%ymm15
|
| # xor remaining blocks, write to output
| vmovdqa64 %ymm4,%ymm0
| cmp $0x0120,%rcx
| jl .Lxorpart8
| vpxord 0x0100(%rdx),%ymm0,%ymm0
| vmovdqu64 %ymm0,0x0100(%rsi)
|
| vmovdqa64 %ymm12,%ymm0
| cmp $0x0140,%rcx
| jl .Lxorpart8
| vpxord 0x0120(%rdx),%ymm0,%ymm0
| vmovdqu64 %ymm0,0x0120(%rsi)
|
| vmovdqa64 %ymm6,%ymm0
| cmp $0x0160,%rcx
| jl .Lxorpart8
| vpxord 0x0140(%rdx),%ymm0,%ymm0
| vmovdqu64 %ymm0,0x0140(%rsi)
|
| vmovdqa64 %ymm14,%ymm0
| cmp $0x0180,%rcx
| jl .Lxorpart8
| vpxord 0x0160(%rdx),%ymm0,%ymm0
| vmovdqu64 %ymm0,0x0160(%rsi)
|
| vmovdqa64 %ymm5,%ymm0
| cmp $0x01a0,%rcx
| jl .Lxorpart8
| vpxord 0x0180(%rdx),%ymm0,%ymm0
| vmovdqu64 %ymm0,0x0180(%rsi)
|
| vmovdqa64 %ymm13,%ymm0
| cmp $0x01c0,%rcx
| jl .Lxorpart8
| vpxord 0x01a0(%rdx),%ymm0,%ymm0
| vmovdqu64 %ymm0,0x01a0(%rsi)
|
| vmovdqa64 %ymm7,%ymm0
| cmp $0x01e0,%rcx
| jl .Lxorpart8
| vpxord 0x01c0(%rdx),%ymm0,%ymm0
| vmovdqu64 %ymm0,0x01c0(%rsi)
|
| vmovdqa64 %ymm15,%ymm0
| cmp $0x0200,%rcx
| jl .Lxorpart8
| vpxord 0x01e0(%rdx),%ymm0,%ymm0
| vmovdqu64 %ymm0,0x01e0(%rsi)
|
| .Ldone8:
| vzeroupper
| ret
|
| .Lxorpart8:
| # xor remaining bytes from partial register into output
| mov %rcx,%rax
| and $0x1f,%rcx
| jz .Ldone8
| mov %rax,%r9
| and $~0x1f,%r9
|
| mov $1,%rax
| shld %cl,%rax,%rax
| sub $1,%rax
| kmovq %rax,%k1
|
| vmovdqu8 (%rdx,%r9),%ymm1{%k1}{z}
| vpxord %ymm0,%ymm1,%ymm1
| vmovdqu8 %ymm1,(%rsi,%r9){%k1}
|
| jmp .Ldone8
|
| ENDPROC(chacha_8block_xor_avx512vl)
|
|
